#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

int main()
{
    pid_t id = fork();

    if(id < 0)
    {
        perror("fork");
        return 1;
    }

    else if(id == 0) // child
    {
        printf("I am child, pid : %d\n", getpid());
        sleep(10);
    }
    else // parent
    {
        printf("I am parent, pid: %d\n", getpid());
        sleep(300);
        exit(0);
    }
    return 0;
}
